Loco motive-furnace



(No Model.) v 2 Sheets-Sheet 2.

H. M. SMITH.

LoGoMoTIVE FURNAGB. No. 264,355. Patented Sept.v l2, 1882.

N. PETERS. Phm-Limugrapher. wnmmgwn, D. C.

- past the diaphragm.

UNITED STATES PATENT OFFICE.

` HOVARD M. SMITH, OF ST. IiOUIS, MISSOURI.

LOCOMOTIVE- FURNACE.

SPECIFICATION forming part of Letters Patent No. 264,355, datedSeptember 12, 1882,

Application filed April 14, 1882.

To all whom it may concern Beit known that I, HOWARD M. SMITH, of St.Louis, Missouri, have made a new and useful Improvement inLocomotive-Furnaces, of which the following is a full, clear, and exactdescription, reference being had -to the annexed drawings, making partof this specica` tion, in which- Figure l is an elevation, lookingtoward the rear end thereof, of a furnace having the iinprovement, theview being partly in section, taken on the line l l of Fig. 3; Fig. 2, avertical transverse section taken on the line 2 2 of Fig. 3 Fig. 3, ahorizontal section taken on the line 3 3 of Fig. 1; Fig. 4, a detail,being an elevation partly in section, showing a portion of the lower endof one of the tiles; Fig. 5, a bottom view of one of the tiles; Fig. 6,a horizontal section similar to that of Fig. 3, but upon an enlargedscale, and showing side tiles as well as the center tiles; and Figs. 7and 8, details.

The same letters denote the same parts.

The presentinvention is an'improved means for more effectually consumingthe fuel and iucreasing the heat in the furnace.

It consists in a diaphragm extending upward and downward in thefurnace-chamber, and so as to leave spaces at the sides of the diaphragmfor the passage of the heat-currents The diaphragm isnot only a means bywhich the gaseous currents and products of combustion are directed tothe sides of the furnace-chamber, but itis also utilized in supplyingcurrents of air or steam, or of both air and steam, to the furnace, andby making the diaphragm of materialsuch as tiling--capable of beinghighly heated the heat of the furnace can be still further increased.

Referring to the drawings, A represents a locomotive-furnace having theimprovement, B being the furnace-door, O the grate, and D the fines, allof the customary description.

E represents a diaphragm composed preferably of tiles and in one or morepieces, and extending upward and downward in the chamber F, andpreferably from the grate G to the roof f, butin all cases so as toleave passages GVG at the sides of the chamber. The diaphragm is-alsopreferably shaped to bring its center e nearer the end f of thefurnace-cham- (No model.)

VbeiI than the wings or sides e c of the diaphragm, the exact shapepreferred in this respect being that shown. The diaphragm hasperforations e2 c3 extending vertically therein, and at variousintervals having branches e4 leading in the direction of the furnace endf to the surface ofthe diaphragm. A portion, e?, of the perforations isfor air-passages, and the others, e3, for steam, the air and steamentering the passages c2 e3 at the lower end of the diaphragm, andpassing thence upward andl through the passages eL outward and into thechamber F. The steam is supplied through a suitable pipe, H. leading,say, from the boiler I. The fuel is placed between the diaphragm and theend fof the chamber F. Thepassages e2 e3 of the diaphragm E may beconnected by a channel, e6.

Side diaphragms, J J, at each side of the furnace-chamber F, may be usedin connection with the center diaphragm. They also extend upward anddownward in the chamber Fili manner similar to that of the diaphragm E,and they may have air and steam passages e2 and e3. The side diaphragms,J J, are useful independently ofthe center diaphragm, E, but are morevaluable in combination therewith.

To better hold the various diaphragms E J J in place, plugs K K, Figs.7, S, areattached to or in the rooff, and made to engage in suitablerecesses or slots, e5, in the diaphragms.

I claim- 1. A furnace chamber, F, having a diaphragm provided with airand steam passages, and extending vertically upward and downward fromthe grate to the top ofthe furnacechamber, leaving passages G G at thesides of the diaphragms, substantially as and for the purpose set forth.

2. In combination with the diaphragms E and J J, provided withaiihpassages e2, steampassages e3, and channel e, the steam-pipe H,

substantially as and for the purpose set forth.

substantially as set forth.

4. A furnace-chamber, F, havin g the center IOO diaphragm, E, and theside diaphragnis, J J, having air-passages e2 and steam-passages e3, allof said diaphragms extending downward and upward in Jhefurnace-chambers, and passages Gr Gr, being provided between the eentraland side diaphragms, substantially as described.

5. The combination of the diaphragm E, the rooff, and the plugs K K,said plugs engaging loosely in the recesses e5, substantially asdescribed.,

6. The combination of the diaphragms J J, lche rooff, .and the plugs KK, said plugs engaging loosely in the recesses e5, substantially asdescribed.

HOVARD 1W. SMITH.

Witnesses G. D. MOODY, SAML. S. BOYD.

